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Journal of Optometry

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https://www.readbyqxmd.com/read/28797649/comparison-of-manual-automated-analysis-methods-for-corneal-endothelial-cell-density-measurements-by-specular-microscopy
#1
Jianyan Huang, Jyotsna Maram, Tudor C Tepelus, Cristina Modak, Ken Marion, SriniVas R Sadda, Vikas Chopra, Olivia L Lee
PURPOSE: To determine the reliability of corneal endothelial cell density (ECD) obtained by automated specular microscopy versus that of validated manual methods and factors that predict such reliability. METHODS: Sharp central images from 94 control and 106 glaucomatous eyes were captured with Konan specular microscope NSP-9900. All images were analyzed by trained graders using Konan CellChek Software, employing the fully- and semi-automated methods as well as Center Method...
August 7, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28780995/agreement-between-total-corneal-astigmatism-calculated-by-vector-summation-and-total-corneal-astigmatism-measured-by-ray-tracing-using-galilei-double-scheimpflug-analyzer
#2
Sepehr Feizi, Siamak Delfazayebaher, Vahid Ownagh, Fatemeh Sadeghpour
PURPOSE: To evaluate the agreement between total corneal astigmatism calculated by vector summation of anterior and posterior corneal astigmatism (TCAVec) and total corneal astigmatism measured by ray tracing (TCARay). METHODS: This study enrolled a total of 204 right eyes of 204 normal subjects. The eyes were measured using a Galilei double Scheimpflug analyzer. The measured parameters included simulated keratometric astigmatism using the keratometric index, anterior corneal astigmatism using the corneal refractive index, posterior corneal astigmatism, and TCARay...
August 3, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28760643/reactive-oxygen-species-oxidative-stress-glaucoma-and-hyperbaric-oxygen-therapy
#3
Charles McMonnies
This review examines the role of oxidative stress in damage to cells of the trabecular meshwork and associated impaired aqueous drainage as well as damage to retinal ganglion cells and associated visual field losses. Consideration is given to the interaction between vascular and mechanical explanations for pathological changes in glaucoma. For example, elevated intraocular pressure (IOP) forces may contribute to ischaemia but there is increasing evidence that altered blood flow in a wider sense is also involved...
July 28, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28676353/more-sensitive-correlation-of-afferent-pupillary-defect-with-ganglion-cell-complex
#4
Eulogio Besada, Barry J Frauens, Rim Makhlouf, Diana Shechtman, Julie Rodman, Marlon Demeritt, Patrick Hardigan
PURPOSE: This study investigated the correlation between the relative afferent pupillary defect (RAPD) and retinal nerve fiber layer thickness (RNFLT) in optic neuropathy. METHODS: RAPD assessment was performed using a log unit neutral density filter bar. Spectral domain optical coherence tomography RTVue-100 (Optovue) was used to examine the subjects. The optic nerve head pattern (ONH) was subdivided and identified for the purpose of the study into circumpapillary RNFLT (cpRNFLT) and peripheral circumpapillary RNFLT (pcpRNFLT)...
July 1, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28676352/assessment-of-neuro-optometric-rehabilitation-using-the-developmental-eye-movement-dem-test-in-adults-with-acquired-brain-injury
#5
Neera Kapoor, Kenneth Joseph Ciuffreda
PURPOSE: This pilot study sought to determine the efficacy of using the Developmental Eye Movement (DEM) test in the adult, acquired brain injury (ABI) population to quantify clinically the effects of controlled, laboratory-performed, oculomotor-based vision therapy/vision rehabilitation. METHODS: Nine adult subjects with mild traumatic brain injury (mTBI) and five with stroke were assessed before and after an eight-week, computer-based, versional oculomotor (fixation, saccades, pursuit, and simulated reading) training program (9...
July 1, 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28911731/science-pseudoscience-evidence-based-practice-and-post-truth
#6
José M González-Méijome
No abstract text is available yet for this article.
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28237358/audio-visual-interaction-in-visual-motion-detection-synchrony-versus-asynchrony
#7
Stephanie Rosemann, Inga-Maria Wefel, Volkan Elis, Manfred Fahle
OBJECTIVE: Detection and identification of moving targets is of paramount importance in everyday life, even if it is not widely tested in optometric practice, mostly for technical reasons. There are clear indications in the literature that in perception of moving targets, vision and hearing interact, for example in noisy surrounds and in understanding speech. The main aim of visual perception, the ability that optometry aims to optimize, is the identification of objects, from everyday objects to letters, but also the spatial orientation of subjects in natural surrounds...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28089205/on-the-power-profiles-of-contact-lenses-measured-with-nimo-tr1504
#8
Manuel Rodríguez-Vallejo, Diego Montagud, Juan A Monsoriu, Walter D Furlan
No abstract text is available yet for this article.
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28040497/a-review-of-mitochondrial-optic-neuropathies-from-inherited-to-acquired-forms
#9
Yasmine L Pilz, Sherry J Bass, Jerome Sherman
In recent years, the term mitochondrial optic neuropathy (MON) has increasingly been used within the literature to describe a group of optic neuropathies that exhibit mitochondrial dysfunction in retinal ganglion cells (RGCs). Interestingly, MONs include genetic aetiologies, such as Leber hereditary optic neuropathy (LHON) and dominant optic atrophy (DOA), as well as acquired aetiologies resulting from drugs, nutritional deficiencies, and mixed aetiologies. Regardless of an inherited or acquired cause, patients exhibit the same clinical manifestations with selective loss of the RGCs due to mitochondrial dysfunction...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28040496/analysis-of-cataract-surgery-induced-astigmatism-two-polar-methods-comparison
#10
Veronica García-López, Claudia García-López, Victoria de Juan, Raul Martin
PURPOSE: Surgically induced astigmatism (SIA) caused by the incision after cataract surgery may be calculated to improve IOL toric power calculation and achieve better visual outcome. SIA could be determined as the difference between preoperative and postoperative keratometry expressed in polar values using different equations. The objective of this study is to compare the SIA calculated with two different polar value analysis methods [Method #1: KP (90)/KP (135) developed to be used with incisions placed at 90° and Method #2: AKP/AKP (+45) developed to be used independently of the incision location]...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27989693/comparison-of-the-clinical-efficacy-of-preserved-and-preservative-free-hydroxypropyl-methylcellulose-dextran-containing-eyedrops
#11
Masoud Safarzadeh, Parvin Azizzadeh, Pedram Akbarshahi
PURPOSE: This study aimed to compare the efficacy of two sustained-release formulation of artificial tear drops. PATIENTS AND METHODS: This is a randomized patient-masked clinical trial, a total 88 patients into two group A (n=41; with single dose of artificial tear, containing dextran 70, 1mg/ml and hypromellose, 3mg/ml hydroxypropyl methylcellulose (HPMC) and group B (n=47; with multidose of artificial tear, containing 0.3g HPMC and 0.1g of dextran 70, with 0...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27956343/cataract-strabismus-and-chorioretinal-coloboma-in-paediatric-hiv-infection
#12
Prakash Adhikari, Pratik Chettry
No abstract text is available yet for this article.
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27866955/analysis-of-the-power-profile-of-a-new-soft-contact-lens-for-myopia-progression
#13
Javier Ruiz-Alcocer
No abstract text is available yet for this article.
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27866954/the-enright-phenomenon-stereoscopic-distortion-of-perceived-driving-speed-induced-by-monocular-pupil-dilation
#14
Andrew Carkeet, Joanne M Wood, Kylie M McNeill, Hamish J McNeill, Joanna A James, Leigh S Holder
PURPOSE: The Enright phenomenon describes the distortion in speed perception experienced by an observer looking sideways from a moving vehicle when viewing with interocular differences in retinal image brightness, usually induced by neutral density filters. We investigated whether the Enright phenomenon could be induced with monocular pupil dilation using tropicamide. METHODS: We tested 17 visually normal young adults on a closed road driving circuit. Participants were asked to travel at Goal Speeds of 40km/h and 60km/h while looking sideways from the vehicle with: (i) both eyes with undilated pupils; (ii) both eyes with dilated pupils; (iii) with the leading eye only dilated; and (iv) the trailing eye only dilated...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27543383/electrophysiological-responses-from-intrinsically-photosensitive-retinal-ganglion-cells-are-diminished-in-glaucoma-patients
#15
Manami Kuze, Takeshi Morita, Yumi Fukuda, Mineo Kondo, Kazuo Tsubota, Masahiko Ayaki
PURPOSE: To record electroretinograms (ERGs) from intrinsically photosensitive retinal ganglion cells (ipRGCs) of glaucoma patients. METHODS: ERGs were recorded in 10 normal subjects and 15 patients with glaucoma. The ERG illumination system was built to achieve receptor-silent substitution, and comprised an optical diffuser and four-in-one light-emitting diodes. RESULTS: The ERG recordings of ipRGC from normal subjects showed an "on" response and an "off" response...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/27423690/diagnostic-capability-of-retinal-thickness-measures-in-diabetic-peripheral-neuropathy
#16
Sangeetha Srinivasan, Nicola Pritchard, Geoff P Sampson, Katie Edwards, Dimitrios Vagenas, Anthony W Russell, Rayaz A Malik, Nathan Efron
PURPOSE: To examine the diagnostic capability of the full retinal and inner retinal thickness measures in differentiating individuals with diabetic peripheral neuropathy (DPN) from those without neuropathy and non-diabetic controls. METHODS: Individuals with (n=44) and without (n=107) diabetic neuropathy and non-diabetic control (n=42) participants underwent spectral domain optical coherence tomography (SDOCT). Retinal thickness in the central 1mm zone (including the fovea), parafovea and perifovea was assessed in addition to ganglion cell complex (GCC) global loss volume (GCC GLV) and focal loss volume (GCC FLV), and retinal nerve fiber layer (RNFL) thickness...
October 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28646980/binocular-vision-in-the-twenty-first-century
#17
Kenneth J Ciuffreda
No abstract text is available yet for this article.
July 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28499859/reply-to-letter-to-the-editor-by-griffiths-et-al-commenting-on-evans-allen
#18
LETTER
Bruce J W Evans, Peter M Allen
No abstract text is available yet for this article.
July 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28254360/the-effect-of-letter-string-length-and-report-condition-on-letter-recognition-accuracy
#19
Avesh Raghunandan, Berta Karmazinaite, Andrea S Rossow
PURPOSE: Letter sequence recognition accuracy has been postulated to be limited primarily by low-level visual factors. The influence of high level factors such as visual memory (load and decay) has been largely overlooked. This study provides insight into the role of these factors by investigating the interaction between letter sequence recognition accuracy, letter string length and report condition. METHODS: Letter sequence recognition accuracy for trigrams and pentagrams were measured in 10 adult subjects for two report conditions...
July 2017: Journal of Optometry
https://www.readbyqxmd.com/read/28126262/changes-in-stimulus-and-response-ac-a-ratio-with-vision-therapy-in-convergence-insufficiency
#20
Neeraj Kumar Singh, Revathy Mani, Jameel Rizwana Hussaindeen
PURPOSE: To evaluate the changes in the stimulus and response Accommodative Convergence to Accommodation (AC/A) ratio following vision therapy (VT) in Convergence Insufficiency (CI). METHODS: Stimulus and response AC/A ratio were measured on twenty five CI participants, pre and post 10 sessions of VT. Stimulus AC/A ratio was measured using the gradient method and response AC/A ratio was calculated using modified Thorington technique with accommodative responses measured using WAM-5500 open-field autorefractor...
July 2017: Journal of Optometry
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